mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-10 18:48:13 +08:00
37 lines
1.6 KiB
HTML
37 lines
1.6 KiB
HTML
<p>A password is considered strong if the below conditions are all met:</p>
|
|
|
|
<ul>
|
|
<li>It has at least <code>6</code> characters and at most <code>20</code> characters.</li>
|
|
<li>It contains at least <strong>one lowercase</strong> letter, at least <strong>one uppercase</strong> letter, and at least <strong>one digit</strong>.</li>
|
|
<li>It does not contain three repeating characters in a row (i.e., <code>"B<u><strong>aaa</strong></u>bb0"</code> is weak, but <code>"B<strong><u>aa</u></strong>b<u><strong>a</strong></u>0"</code> is strong).</li>
|
|
</ul>
|
|
|
|
<p>Given a string <code>password</code>, return <em>the minimum number of steps required to make <code>password</code> strong. if <code>password</code> is already strong, return <code>0</code>.</em></p>
|
|
|
|
<p>In one step, you can:</p>
|
|
|
|
<ul>
|
|
<li>Insert one character to <code>password</code>,</li>
|
|
<li>Delete one character from <code>password</code>, or</li>
|
|
<li>Replace one character of <code>password</code> with another character.</li>
|
|
</ul>
|
|
|
|
<p> </p>
|
|
<p><strong class="example">Example 1:</strong></p>
|
|
<pre><strong>Input:</strong> password = "a"
|
|
<strong>Output:</strong> 5
|
|
</pre><p><strong class="example">Example 2:</strong></p>
|
|
<pre><strong>Input:</strong> password = "aA1"
|
|
<strong>Output:</strong> 3
|
|
</pre><p><strong class="example">Example 3:</strong></p>
|
|
<pre><strong>Input:</strong> password = "1337C0d3"
|
|
<strong>Output:</strong> 0
|
|
</pre>
|
|
<p> </p>
|
|
<p><strong>Constraints:</strong></p>
|
|
|
|
<ul>
|
|
<li><code>1 <= password.length <= 50</code></li>
|
|
<li><code>password</code> consists of letters, digits, dot <code>'.'</code> or exclamation mark <code>'!'</code>.</li>
|
|
</ul>
|